Mark is referring to the fact that a stock Boxster has very little negative camber in the front and therefore you will tend to wear out the outer edges of your front tires more rapidly on the track or at an AX.

Dan, thanks for clarifying it.

Hmm... if I increase the negative camber in the front... and not cornering the car on the street as hard as on the track, then the inside edges of the front tires will go soon?